/** * Declares compatibility with "High-Performance Order Storage (HPOS)". * * @see https://wpcodebook.com/snippets/declare-compatibility-with-custom-order-tables-for-woocommerce/ * @see https://github.com/woocommerce/woocommerce/wiki/High-Performance-Order-Storage-Upgrade-Recipe-Book#declaring-extension-incompatibility */ add_action( 'before_woocommerce_init', function () { if ( class_exists( '\Automattic\WooCommerce\Utilities\FeaturesUtil' ) ) { \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'custom_order_tables', __FILE__, true ); } }
The code goes to the main plugin file.